Flexible conduits- Electrical flexible conduit/GI-galvanized flexible steel conduit
(20mm, 25mm… 114mm)are used to connect to motors or other devices where
isolation from vibration is useful, or where an excess number of fittings would
be needed to use rigid connections. Electrical codes may restrict the length of
a run of some types of flexible conduit.Flexible metallic conduit-Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm) used in an underground
parking facility.

Flexible Metallic Conduit(FMC, often informally called greenfield
or flex)-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm)
is made by the helical coiling of a self-interlocked ribbed strip of aluminum
or steel, forming a hollow tube through which wires can be pulled. FMC-Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) is used
primarily in dry areas where it would be impractical to install EMT or other
non-flexible conduit, yet where metallic strength to protect conductors is
still required. The flexible tubing does not maintain any permanent bend.FMC-Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) may be
used as an equipment grounding conductor if specific provisions are met
regarding the trade size and length of FMC -Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm)used in addition to the
amperage of the circuits contained in the conduit. In general an equipment
grounding conductor must be pulled through the FMC-Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm) with an ampacity suitable to
carry the fault current likely imposed on the largest circuit contained within
the FMC-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm).

Flexible Metallic Tubing
(FMT)-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm)
is not the same as Flexible Metallic Conduit (FMC)-Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm) which is described in
National Electrical Code (NEC) Article 348. FMT is a raceway, but not a conduit
and is described in a separate NEC Article 360. It only comes in 1/2"
& 3/4" trade sizes, whereas FMC is sized 1/2" ~ 4" trade
sizes. NEC 360.2 describes it as: "A raceway that is circular in cross
section, flexible, metallic and liquidtight without a nonmetallic jacket."

Liquid tight Flexible Nonmetallic Conduit (LFNC) -Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) refers
to several types of flame-resistant non-metallic tubing. Interior surfaces may
be smooth or corrugated. There may be integral reinforcement within the conduit
wall. It is also known as FNMC.

Flexible conduits- Electrical flexible conduit/GI-galvanized flexible steel conduit
(20mm, 25mm… 114mm)are used to connect to motors or other devices where
isolation from vibration is useful, or where an excess number of fittings would
be needed to use rigid connections. Electrical codes may restrict the length of
a run of some types of flexible conduit.Flexible metallic conduit-Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) used in
an underground parking facility.

Flexible Metallic Conduit (FMC, often informally called greenfield
or flex)-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm)
is made by the helical coiling of a self-interlocked ribbed strip of aluminum
or steel, forming a hollow tube through which wires can be pulled. FMC-Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) is used
primarily in dry areas where it would be impractical to install EMT or other
non-flexible conduit, yet where metallic strength to protect conductors is
still required. The flexible tubing does not maintain any permanent bend.FMC-Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) may be
used as an equipment grounding conductor if specific provisions are met
regarding the trade size and length of FMC -Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm)used in addition to the
amperage of the circuits contained in the conduit. In general an equipment
grounding conductor must be pulled through the FMC-Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm) with an ampacity suitable to
carry the fault current likely imposed on the largest circuit contained within
the FMC-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm).

Flexible Metallic Tubing
(FMT)-Electrical
flexible conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm)
is not the same as Flexible Metallic Conduit (FMC)-Electrical flexible conduit/GI-galvanized
flexible steel conduit (20mm, 25mm… 114mm) which is described in
National Electrical Code (NEC) Article 348. FMT is a raceway, but not a conduit
and is described in a separate NEC Article 360. It only comes in 1/2"
& 3/4" trade sizes, whereas FMC is sized 1/2" ~ 4" trade sizes.
NEC 360.2 describes it as: "A raceway that is circular in cross section,
flexible, metallic and liquidtight without a nonmetallic jacket."

Liquid tight Flexible Nonmetallic Conduit (LFNC) -Electrical flexible
conduit/GI-galvanized flexible steel conduit (20mm, 25mm… 114mm) refers
to several types of flame-resistant non-metallic tubing. Interior surfaces may
be smooth or corrugated. There may be integral reinforcement within the conduit
wall. It is also known as FNMC.